What job does the circulatory system /muscular tissue your organ systems do in the body

Choose one animal (cheetas) and research on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

Is dna the same in every cell in the human body explain your answer

When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?